Three Phase 125A Din Rail ATS Dual Power Automatic Transfer Switch 4P Electrical Selector Uninterrupted Power Generator 50/60Hz

Model

DGLBD-125/4

Class

PC-class Infrequent Change-over Switch (Dual Power Design)

Core Function

Automatic transfer to backup power (B) when main power (A) fails:
- Transfer speed <50ms
- Priority given to Power A when both sources are available

Application

City Power ⇆ Generator（not for PV system and Inverter.）

Ratings

Current: 10-125A

Voltage: AC 220V/110V

Frequency: 50-60Hz

Precautions

Operational Rules
- Manual switching prohibited in auto mode
- 4P models require correct phase sequence
- Coil voltage range: 85%-110% rated voltage

Maintenance
- Complete power cutoff required before manual operations
- Silver alloy contacts may degrade faster due to inconsistent manual operation speeds

Modes

Automatic Mode
- Set selector switch to ''Auto'' position
- Control circuit energized immediately after transfer

Manual Mode
1. Mandatory pre-steps:
- Cut off all power
- Set selector to ''Manual'' position
2. Must return to ''Auto'' position after completion

Warnings

1. Insufficient voltage causes coil overheating/burnout
2. Incorrect phase sequence leads to contact burnout
3. Manual switching under load may damage control circuit